/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.runtime.rest.messages;

import org.apache.flink.api.common.resources.Resource;
import org.apache.flink.runtime.clusterframework.types.ResourceProfile;

import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonCreator;
import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.annotation.JsonProperty;

import java.util.Collections;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * Contains information of a {@link ResourceProfile}.
 */
public class ResourceProfileInfo implements ResponseBody {

	public static final String FIELD_NAME_CPU = "cpuCores";

	public static final String FIELD_NAME_TASK_HEAP = "taskHeapMemory";

	public static final String FIELD_NAME_TASK_OFFHEAP = "taskOffHeapMemory";

	public static final String FIELD_NAME_MANAGED = "managedMemory";

	public static final String FIELD_NAME_NETWORK = "networkMemory";

	public static final String FIELD_NAME_EXTENDED = "extendedResources";

	@JsonProperty(FIELD_NAME_CPU)
	private final double cpu;

	@JsonProperty(FIELD_NAME_TASK_HEAP)
	private final int taskHeapMB;

	@JsonProperty(FIELD_NAME_TASK_OFFHEAP)
	private final int taskOffHeapMB;

	@JsonProperty(FIELD_NAME_MANAGED)
	private final int managedMB;

	@JsonProperty(FIELD_NAME_NETWORK)
	private final int networkMB;

	@JsonProperty(FIELD_NAME_EXTENDED)
	private final Map<String, Double> extendedResources;

	@JsonCreator
	public ResourceProfileInfo(
			@JsonProperty(FIELD_NAME_CPU) double cpu,
			@JsonProperty(FIELD_NAME_TASK_HEAP) int taskHeapMB,
			@JsonProperty(FIELD_NAME_TASK_OFFHEAP) int taskOffHeapMB,
			@JsonProperty(FIELD_NAME_MANAGED) int managedMB,
			@JsonProperty(FIELD_NAME_NETWORK) int networkMB,
			@JsonProperty(FIELD_NAME_EXTENDED) Map<String, Double> extendedResources) {
		this.cpu = cpu;
		this.taskHeapMB = taskHeapMB;
		this.taskOffHeapMB = taskOffHeapMB;
		this.managedMB = managedMB;
		this.networkMB = networkMB;
		this.extendedResources = extendedResources;
	}

	/**
	 * The ResourceProfile must not be UNKNOWN.
	 */
	private ResourceProfileInfo(ResourceProfile resourceProfile) {
		this(resourceProfile.getCpuCores().getValue().doubleValue(),
			resourceProfile.getTaskHeapMemory().getMebiBytes(),
			resourceProfile.getTaskOffHeapMemory().getMebiBytes(),
			resourceProfile.getManagedMemory().getMebiBytes(),
			resourceProfile.getNetworkMemory().getMebiBytes(),
			getExetendedResources(resourceProfile.getExtendedResources()));
	}

	private ResourceProfileInfo() {
		this(-1.0, -1, -1, -1, -1, Collections.emptyMap());
	}

	public static ResourceProfileInfo fromResrouceProfile(ResourceProfile resourceProfile) {
		return resourceProfile.equals(ResourceProfile.UNKNOWN) ? new ResourceProfileInfo() : new ResourceProfileInfo(resourceProfile);
	}

	private static Map<String, Double> getExetendedResources(Map<String, Resource> exetendedResources) {
		return exetendedResources.entrySet().stream()
			.collect(Collectors.toMap(Map.Entry::getKey, e -> e.getValue().getValue().doubleValue()));
	}

	public double getCpu() {
		return cpu;
	}

	public int getTaskHeapMB() {
		return taskHeapMB;
	}

	public int getTaskOffHeapMB() {
		return taskOffHeapMB;
	}

	public int getManagedMB() {
		return managedMB;
	}

	public int getNetworkMB() {
		return networkMB;
	}

	public Map<String, Double>getExtendedResources() {
		return Collections.unmodifiableMap(extendedResources);
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) {
			return true;
		}
		if (o == null || getClass() != o.getClass()) {
			return false;
		}
		ResourceProfileInfo that = (ResourceProfileInfo) o;
		return cpu == that.cpu &&
			taskHeapMB == that.taskHeapMB &&
			taskOffHeapMB == that.taskOffHeapMB &&
			managedMB == that.managedMB &&
			networkMB == that.networkMB &&
			Objects.equals(extendedResources, that.extendedResources);
	}

	@Override
	public int hashCode() {
		return Objects.hash(
			cpu,
			taskHeapMB,
			taskOffHeapMB,
			managedMB,
			networkMB,
			extendedResources);
	}
}
